On December 17, 2025, Mozilla made a significant leadership change, naming Anthony Enzor-DeMeo as its new CEO, who took over from interim leader Laura Chambers. Right after assuming his new role, Enzor-DeMeo unveiled an ambitious 'AI-first' approach. This strategy entails integrating advanced large language models, including ChatGPT, Claude, and Gemini, into the very core of Firefox's architecture. The primary goal is to reverse the downward trend of Firefox's market share, which has dipped below 3%, and to reduce its heavy dependence on revenue generated from Google search.

Enzor-DeMeo envisions enhancing the browser's functionality by introducing features such as content summaries, text rewriting capabilities, and intelligent search assistants, all conveniently accessible alongside the browser tabs. To address potential user concerns, he has also proposed including a 'global toggle-off' button, allowing users to easily disable the AI features if they wish.

However, this bold move has not been well-received by the developer community. The main source of contention lies in the potential privacy and security risks associated with such extensive AI integration. Critics point out that this approach goes against Firefox's long-held commitment to 'anti-tracking' principles, which have been a cornerstone of its appeal to privacy-conscious users. They fear that the integration of these large language models could create vulnerabilities that malicious actors might exploit to steal sensitive user data, posing a significant threat to user privacy and security.